6093 7. Respiration

Energy is created during both aerobic and anaerobic respiration

• True

• False

Match the following

• carbon dioxide and water

• substrate for aerobic respiration only

• glucose

• substrate for both aerobic and anaerobic respiration

• lactic acid

• product in anaerobic respiraiton

• oxygen

• product in aerobic respiration

​ (a)   respiration when the body does not​ provide sufficient ​ (b)   to muscles. The body will release extra ​ (c)   for muscular contractions.

• Anaerobic
• oxygen
• energy
• carbon dioxide
• Aerobic

The extra oxygen needed is to oxidise lactic acid into...

• carbon dioxide and oxygen

• oxygen and water

• carbon dioxide and water

• carbon dioxide, water and oxygen

During oxygen debt, the lactic acid is removed from

• Liver

• Muscles

• Lungs

• Heart

Label the structures.

d

e

f

g

bronchus

bronchiole

oesophagus

trachea

pharynx

larynx

alveoli

Cell X can be found in the ​ (a)   . It contains ​ (b)   to​ (c)   the mucus that can ​ ​ ​ (d)   dust particles.

• trachea
• cilia (hair)
• sweep
• trap
• alveolus
• digest
• enzymes

For inhalation to take place,

• diaphragm contracts and flattens

• diaphragm relaxes and arches upwards

• external intercostal muscle relaxes, internal intercostal contracts

• external intercostal muscle contracts, internal intercostal relaxes

For inhalation to take place,

• ribs move outwards and upwards

• ribs move downwards and inwards

• pressure of lungs become lower than atmospheric pressure

• pressure of lungs become higher than atmospheric pressure

What is the sequence of events in inhalation?

• diaphragm contracts and flattens, external intercostal muscles contracts

• volume of lungs will increase

• this causes pressure of lungs to become lower than pressure of atmosphere

• air will thus move into the lungs

• ribs move outwards and upwards